“I have only one thing to say. Todd McKenney is a Headline Whore. Shame on him. His sister on the other hand is the love of my life and wife of over 31 years. I love her to the end of the world,” he wrote on Facebook on Tuesday night.

“NEWS OF THE DAY: I have just formed a special lobby group called BRING BACK CRAIG McLACHLAN!” he later added.

Lisa also reportedly admonished her brother, saying “my brother is being a douchebag. We all just have to duck the fall out now. Selfish, lying idiot.”

McKenney replaced McLachlan in the role of Frank-N-Furter in the Rocky Horror Picture Show musical after allegations of sexual harassment were levelled against him by his co-stars.

McKenney said he and his sister have a “weird relationship”, but said there are no hard feelings between them.

“If you’re happy go for it,” he said.

“They got married and have got three kids and I’m close to their kids.”

McKenney said he’d been keeping the secret hidden from the media for years in order to protect his sister’s children. However, now that they’re adults, things are different.

“For the sake of them I haven’t said it, but they’re grown up now and I get on with them and they know the stories now,” he said.